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There and Back Again... A Tale About Two-Field Inflation and Non-Gaussianity

21 November 2012

Time: 4:30pm
Venue: Maths 103
The London Relativity and Cosmology Seminar
Eleftheria Tzavara (Paris)

Inflationary predictions for the power spectrum of the curvature perturbation have been verified to an excellent degree, leaving many models compatible with observations. Higher-order correlations, if detected or constrained by Planck, will allow one to further distinguish between inflationary models. In this talk I will review the theory of gauge-invariant non-linear cosmological perturbations in the context of two-field inflation as well as the properties of the local bispectrum produced in these models. I will also present the methods I have developed and used for this purpose, which are the long-wavelength formalism and the cubic action of the adiabatic and isocurvature perturbations, and illustrate their use with explicit applications.

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